Beam-beam effects and mitigation in a future proton-proton collider

作     者：Li-Jiao Wang Tanaji Sen Jing-Yu Tang Lin-Hao Zhang Li-Jiao Wang;Tanaji Sen;Jing-Yu Tang;Lin-Hao Zhang

作者机构：Institute of High Energy PhysicsCASYuquan Road 19BBeijing 100049China University of Chinese Academy of SciencesCAS19A Yuquan RoadBeijing 100049China Spallation Neutron Source Science CenterDongguan 523803China Fermi National Accelerator LaboratoryP.O.Box 500BataviaIL 60510USA 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2022年第33卷第10期

页      面：90-105页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. 11575214, 11527811, and 11805218) the Fermi Research Alliance LLC under contract no. DE-AC02-07CH11359with the U.S. Department of Energy 

主　　题：Particle collider Beam-beam effects Luminosity Tune footprint Dynamic aperture 

摘      要：The beam-beam effects in a hadron collider with an unprecedented energy scale were *** effects are strongly related to the attainable luminosity of the ***-range interactions were identified as the major factor limiting the dynamic aperture,which is strongly dependent on the crossing angle,β*,and bunch *** mitigation methods of the beam-beam effects were addressed,with a focus on the compensation of long-range interactions by electric curren *** CEPC-SPPC project is a two-stage large circular collider,with a first-stage circular electron-positron collider(CEPC)and a second-stage super proton-proton collider(SPPC).The design of the SPPC aims to achieve a center-of-mass energy of 75 TeV and peak luminosity of approximately 1×10^(35) cm^(-2)s^(-1).We studied the beam-beam effects in the SPPC and tested the effectiveness of the mitigation *** found that with compensation using electric current wires,the dynamic aperture is at an acceptable ***,considering the significant emittance damping in this future proton-proton collider the beam-beam effects and compensation are more complicated and are studied using long-term *** was found that with a smaller emittance,the head-on interactions with a crossing angle become more prominent in reducing the beam stability,and combined head-on and long-range compensation is needed to improve the beam *** the reduction in population owing to burnoff was included,it was found that the coupling between the transverse and longitudinal planes at smaller emittance is the main driving source of the ***,crab cavities and emittance control are also necessary than just the compensation of the long-range interactions to improve the beam *** study serves as an example for studying the beam-beam effects in future proton-proton colliders.